02110.00 1068 Wood Products
Description
02110.00Scope - This Section includes the requirements for wood posts and blocks for guardrail,
median barrier, signs, fence posts, and braces for fencing.
Materials
02110.10Guardrail Posts:
Douglas fir, Hem -fir, or Southern Yellow Pine. Wood for pos ts shall have a minimum extreme fiber bending stress (F b) of 1,200 psi. Only treated posts from approved Suppliers that are listed in the Nonfield-Tested Materials Acceptance Guide will be allowed.
• Douglas Fir - Conform to the requirements for No. 1 posts and timbers as specified in either paragraph 80.11 of the current WWPA Grading Rules, or paragraph 131- b of the current WCLIB Grading Rules.
• Hem -fir - Conform to the requirements for selec t structural posts and timbers as specified in either paragraph 80.10 of the current WWPA Grading Rules, or paragraph 131- a of the current WCLIB Grading Rules. • Southern Yellow Pine - Conform to the requirements for No. 1 timbers as specified in section 402 of the current Southern Pine Inspection Bureau (SPIB) Grading Rules.
as shown.
amount of seasoning or conditioning having occurred prior to treatment, so that further shrinkage of treated posts will not create checking which would expose untreated wood.
At the time of inspection at the plant and at the time of installation each treated post will be subject to inspection for evidence of seasoning having occurred. The presence of checking on the surface of the post will not be cause for rejection unless the width of the widest check, shake, or split exceeds 1/2 inch (surface measurement). If an otherwise acceptable treated post has a through check, shake, or end split in the same slope of grain or plane as the bolt hole and extending from the top of the post to within 3 inches of the bolt hole, the post will be rejected unless it is provided with a tight fastening across the separation, centered on the po st, and 2 inches below the top. Fasten with a 1/2 inch diameter galvanized bolt and nut with a galvanized washer under the bolt head and under the nut after final curing of post is achieved. Treat holes for fastenings according to 00570.40.
02110.10 1069 (g) Inspection, Rejection and Marking at Plant - Posts shall be subject to inspection at the treating plant at any time before, during or after treatment. Normally, inspection of treated posts will be made by the Agency's Inspector not later than 10 Calendar Days after treatment, provided the Inspector is notified of the time that treating is to be done. Inspection of treated posts for compliance with the requirements of 02110.10(e) will be according to applicable AWPA standards, except as follows:
• The Inspector will choose the number of treated posts from any one charge of the treating cylinder for determining penetration of treatment. • Each post selected for testing shall be representative as a basis of acceptance or rejection of a pro rata number of po sts in the charge. • If 20 percent of the posts randomly selected for testing fail to conform to requirements, all of the posts in the entire charge from which they are selected may be classed as unacceptable. At the Inspector 's discretion, each treated pos t or a representative random selection of treated posts may be inspected for compliance with the requirements of 02110.10(f) "Seasoning and Checking".
Posts which fail to conform to requirements of this Subsection will be subject to rejection at the treating plant singly, by partial lots, or by whole lots. (A "lot" comprises the posts in any charge of the treating cylinder.) Each treated post shall bear a permanent mark or metal tag which identifies the Supplier and year of treatment, placed by the Suppl ier either:
• On the top of the post, or • On the back of the post, 8 inches to 10 inches below the bolt hole.
post for:
• Width of widest check, shake, or split. • Damage to treated wood affecting soundness. • Visible exposure of untreated wood. • Conformance to the requirements of 02110.10(b) through 02110.10(f). • Preservative visibly leaching from the post.
Posts that show a check, shake, or split exceeding 1/2 inch in widt h (surface measurement) on any surface will be rejected.
Posts that show surface damage may be repaired by field treating with preservatives according to AWPA Standard M 4. Repair posts that have splits or checks, or where shakes have opened or deepened sufficiently to expose untreated wood, by treating with a field preservative from the QPL applied to all opened or deepened wood separations and completely filling the separations to the surface of the post.
Remove treated wood posts that have be en rejected for any one or more of the above deficiencies or faults and not repaired as stated above.
Acceptance of Material will be according to 00165.35, 02110.10(g), and the Specifications.
02110.20 1070 02110.20 Guardrail Blocks:
Douglas fir or Hem -fir meeting the requirements of 02110.10, or pine or Southern Yellow Pine meeting the requirements of 02110.20(b) and 02110.10 except for 02110.10(b). The requirements of marking and branding the treated blocks, according to the last paragraph of 02110.10(g), will be waived provided that the Supplier of the treated blocks furnishes certification with eac h shipment stating that the blocks conform to Specifications and that the preservative treating was done under the inspection and with the approval of the Engineer.
current WWPA Grading Rules. Southern Yellow Pine guardrail blocks shall conform to the requirements for No. 1 timber as specified in section 402 of the current SPIB Grading Rules.
02110.30Fence Posts and Braces - Fence posts and brace rails shall be of the sizes and
dimensions shown and shall be of sound Douglas fir, western hemlock, or western pine free from decay, end splits, and multiple crooks. Seasoning checks of not more than 5/16 inch width (surface measurement) will be allowed. Allowable crooks may be in one plane only. A line drawn between the centers of the butt and tip of each post and brace rail shall not fall outside of the actual longitudinal centerline of the post or rail by more than 1.67 percent of its length, with an allowable maximum of 2 inches.
Posts and br ace rails may be square, rough, or dressed lumber, or may be peeled round posts, as the Contractor elects. Round members shall be free from bark, protruding knots and irregularities detrimental to a pleasing appearance. Fabricate posts and brace rails before pressure treatment. Where field boring or field cutting of a treated member is required, field- treat the exposed untreated surface of the member according to 00570.40. The size of holes after treatment shall not exceed the size of the dowels or bolts to be inserted by more than 1/16 inch.
Posts intended to be driven may be machine- pointed on either the small end or the large end, before pressure treatment. Pressure treat the posts and brace rails according to Section 02190.
Acceptance of Material will be according to 00165.35 and the Specifications.
02110.40Wood Sign Posts - Fabricate wood sign posts from Douglas fir, surfaced four sides (S4S)
and free of heart center (FOHC).
paragraphs of either the current WCLIB Grading Rules or the current WWPA Grading Rules, as follows:
Species 4" x 4" 4" x 6" 6" x 6" and Lar ger Douglas Fir No. 1 No. 1 No.1 124-b WCLIB 123-b WCLIB 131-b WCLIB
42.11WWPA 62.11 WWPA 80.11 WWPA
02110.40 1071 (b) Posts - Construct wood sign posts according to the applicable portions of Section 00570, modified or supplemented as follows:
sufficient length to provide proper sign mounting, a proper mounting height and the required foundation depth.
practica ble.
Section 02190.
preservative as originally used to treat the post, except that if the post was originally treated with pentachlorophenol - volatile petroleum solvent (LPG) solution, cuts, abrasions and bolt -holes shall be treated with pentachlorophenol - minerals pirits solvent solution according to AWPA Standard M4.